Vol. 5 Issue 3

Ali Ahmad Fora
Let (X. T) be a topological space and let W(T) be the set of all lower semicontinuous functions defined from X into the closed unit interval, [0,1]. In this paper we define two fuzzy separation axioms. namely, functionally Hausdorff and complete regularity. Then we prove a) the space (X, T) is functionally Hausdorff if and only if the fuzzy space (X, W(T)) is functionally Hausdorff. and b) the space (X. T) is completely regular if and only if the fuzzy space (X, W(T)) is completely regular.

Saad S.M. Hassan
A new lidocaine responsive liquid membrane electrode based on the use of lidocaine reineckate ion pair complex in nitrobenzene solvent is developed. The electrode displays a linear response for 10^-2 -10^-5M lidocaine over the pH range of 3-6.5. The response time varies from 35 sec to one min depending on the lidocaine concentration. The life span of the electrode is at least 1 month. Excipients and diluents commonly used in local anesthetic formulations do not interfere. Determination of lidocaine in some pharmaceutical preparations gives results with an average recovery of 99% of the nominal values and a mean standard deviation of 1.7% which compare favorably with those obtained by the United States Pharmacopoeia method.

Lamy G. Girgis and Selim F. Estefan
Chemical processing of two dolomitic magnesite rocks by scrubbing with dilute hydrochloric acid has delivered magnesia concentrates of good quality, containing very low levels of calcium oxide. The recovered magnesia samples were used for the preparation of magnesia and magnesia-chrome refractory bricks of acceptable properties.

Thanun M. Pyriadi and Kasim S. Hadi
Several new members of N- substitutedmaleisoimides and phthalisoimides are prepared. Four of these compounds are N- arylphthalisoimides, three are N- arylisomaleimides, and one is N-cycloprophylmaleisoimides. The yields of N(2- ethylphenyl) phthalisoimide and other isoimides were compared when the dehydration of the corresponding amic acids performed using trifluoroacetic anhydride (TFAA), ethyl chloroformate (ECF), and N, N-dicyclohexylcarbodiimide (DCC). Structure determination of the new compounds were based on IR, NMR and isomerization of the isoimides to the corresponding imides.

Mahmoud A. Hassan, Mohammed A. Al-Yahya And Jaber S. Mossa
A proton NMR analytical procedure for the quantitative determination of the major constituents of the volatile oil of Thymus vulgaris L. (fam. Labiatae) growing in Saudi Arabia is developed. The constituents determined are phenols (thymol, carvaerol, and others), p-cymene and gamma- terpinene. This method is specific, accurate and rapid. It can also be applied for other thyme oils.

S.S. Al-Showiman, A.M. Al-Shalan, and I.M. Al-Najjar
A series of 18 imines, Ar(Me)C=N~R, Ar(Ph)C=N~R, where Ar=C4H3S (2 or 3 thienyl), X-C4H2S(X= 5-Br, 5-Me, X2 - C4HS (X2= 2.5-diMe). R=Me.1.pr.t.Bu.Bu.Bz) have been prepared and thoroughly investigated by 1H and 13C NMR spectroscopy. The NMR results show that the imines exist in solution as an equilibrating E/Z isomer mixture at ambient temperature for X2-C4HS (X2= 2.5-- diMe) imines and only a single E-isomer exists or other imines. In addition, 1H NMR spectra have been obtained in different solvents and analysed. UV and IR spectra of some off the title compounds are also reported

E.M. Abdelrahman, A.I. Bayoumi, and H.M. El-Araby
This paper emphasizes the basic ideas behind the usefulness of the least-squares method in determining the optimum depth to a buried spherical body from second vertical derivative maps by finding a solution of a non-linear equation in the form of f(z) =O. The derived formulae can be directly computerized. The depth to the center of the Humble Salt Dome. estimated by our present approach, is found to be comparable with other literatures previously published.

Ezzat A. Ahmed
The Cretaceous Duwi (phosphate) Formation of the Nile Valley (Mahamid area) and Red Sea (Nasser, Yunis, Queih and Um el Heutat areas) were studied. Ca, P, F, Na and Mg were determined quantitatively using the electron microprobe analyzer. Francolite is the principal phosphate mineral in the studied samples. It exhibits different isomorphous substitutions. Red Sea francolites show relatively high cation substitutions. About 5% of the Ca ions can be replaced by Na and Mg. Maximum cation substitutions should take the form Ca(9.54) Mg(0.10) Na(0.36). The Nile valley francolites show relatively high anion substitutions. About 10% of the (PO4) group is replaced by the (CO3) group and/or (CO3 + F) group. Maximum anion substitutions should take the form Ca(9.54) Mg(0.10) Na(0.36). The Nile valley francolites show relatively high anion substitutions. About 10% of the (PO4) group is replaced by the (CO3) group and/or (CO3 + F) group. Maximum anion substitutions should take the form (PO4)5.39 (CO3F)0.61. Such variable substitutions are attributable to the effect of formational and secondary alteration environmental

Samir M. Kotob
The collective area of use, display, and processing of Arabic script by computer has been referred to as computer Arabization. This paper reviews the general requirements and constituents of Arabic computing. To determine the need for special Arabic computer system software, a large user survey was conducted in the State of Kuwait. It addressed specific issues such as Arabic programming languages, Arabic operating systems, and Arabic application software. The outcome indicates overwhelming support for an Arabic programming language. The lack of Arabic application software was seen as the main obstacle to computer use in Arabic. There is great support for Arabization activities and efforts among all Arab users' groups.

Lamey G. Girgis, N. Yehia, A. Abd-Allah and N. Ibrahim
The physical and technical properties of clay materials from different localities in Iraq were investigated for making fire-clay refractories. Medium-heat duty fireclay bricks could be produced using suitable grog/raw clay ratios. To achieve high strength, good volume stability, and suitable density and porosity, the bricks should be pressed under 250 kg/cm2 and fired to at least 1300 °C. The role of the relatively more plastic clays as a binder was also studied and was found to improve the sintering properties and to decrease the firing temperatures of the finished bricks.